laravel打出sql语句

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方法一

orm直接调用toSql()方法，如：

$sql = UserModel::query()->where('role','2')->toSql();
dd($sql);  //select * from User_table where role = '2'

方法二

打开app\Providers\AppServiceProvider.php，在boot方法中添加如下内容

5.2以下版本

// 先引入DB 
use DB;
// 或者直接使用 \DB::DB::listen(function($sql, $bindings, $time) {dump($sql);});
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5.2及以上版本

use DB;
// 或者直接使用 \DB::
// 只能接受一个参数QueryExecuted {#84 ▼+sql: "select * from `posts` where `slug` = ? limit 1"+bindings: array:1 [▶]+time: 0.59+connection: MySqlConnection {#85 ▶}+connectionName: "mysql"
}DB::listen(function($sql) {dump($sql);// echo $sql->sql;// dump($sql->bindings);});// 如果要放入日志文件中
DB::listen(function ($sql) {// $sql is an object with the properties://  sql: The query//  bindings: the sql query variables//  time: The execution time for the query//  connectionName: The name of the connection// To save the executed queries to file:// Process the sql and the bindings:foreach ($sql->bindings as $i => $binding) {if ($binding instanceof \DateTime) {$sql->bindings[$i] = $binding->format('\'Y-m-d H:i:s\'');} else {if (is_string($binding)) {$sql->bindings[$i] = "'$binding'";}}}// Insert bindings into query$query = str_replace(array('%', '?'), array('%%', '%s'), $sql->sql);$query = vsprintf($query, $sql->bindings);// Save the query to file$logFile = fopen(storage_path('logs' . DIRECTORY_SEPARATOR . date('Y-m-d') . '_query.log'),'a+');fwrite($logFile, date('Y-m-d H:i:s') . ': ' . $query . PHP_EOL);fclose($logFile);}
);